How to configure and appoint the default wallpaper for desktop display in build for "desktop gnome"

[lay]

I want to change the default display wallpaper, in order to be more nice!!!

for  "desktop gnome"：

How to configure and appoint   the default wallpaper for desktop display in build ???

Please help tell me the location！！！thank

[Werner]

duplicate

 

https://forum.armbian.com/topic/44868-may-i-ask-where-to-add-and-place-the-background-image？？/#comment-201131